ATP
I'm of the opinion that the only player that stands in Djokovic's way is his "slam nemesis", Wawrinka. Therefore, these propositions look good:
Djokovic -160
Wawrinka +1088
You can vary your units on each to ensure profitability.
WTA
There's no defacto favorite here. Serena and Vika might not even make the semis. Therefore, value picks are:
Muguruza +1419
Kvitova +2057